Abstract: A hand-held electronic instrument including a unitary, sleeve-shaped housing having a battery compartment and an electronics compartment housing a microcomputer. A sensing probe and a probe mounting member are removably mounted and fluidically sealed to the front end portion of the housing. A battery door assembly fluidically seals the rear end portion of the housing and is removable to provide access to the battery compartment for replacing spent batteries. A latch pin extending laterally from the latch operator of the battery door assembly engages a partition on the housing to retain the assembly to the housing. A battery polarizing plate disposed intermediate the battery and the electrical contacts for the battery ensure that the proper polarity is applied. Software stored in the microcomputer includes a calibration routine for facilitating calibration of the instrument and an energy savings routine for extending the life of the battery.

Abstract: An adjustable pocket thermometer sheath assembly includes a sheath having a longitudinally extending body member defining a central bore. A pocket clip has a sleeve portion slidably mounted on the sheath and a body member having an opening. The pocket clip is slidably moveable on the sheath from an adjustment position, where the sleeve portion is disposed proximate the lower end of the sheath and the body member extends longitudinally outward from the lower end, to a storage position, where the sleeve portion is disposed proximate the upper end of the sheath and the body member is disposed adjacent the exterior surface of the sheath. The adjustment member of the thermometer may be inserted into the opening when the pocket clip is in the adjustment position such that the inner surface of the opening engages the flats of the adjustment member to prevent rotation therebetween.